application of innovative developments in material sciences for heat power devices

Application of Innovative Developments in Material Sciences

for Heat Power Devices

K.E. Tsyolkovsky «MATI» - Russian State Technological UniversityTechnologies of Materials Treatment by High Energy Flows Department www.tompve.ru

tel: +7-495-3538334, fax: +7-495-3538372, e-mail: tompve-2005@yandex.ru

Prof. Boris L. Krit

At present flameless catalytic burning is the most economic method of fuels burning among all-known ones (efficiency of 99-99,8%). Catalytic oxidation proceeds at moderate temperatures 400-680 0C (in torch furnaces – 1200-1800 0C), but with very high velocity. Thermal strength – to 108 kJ/m3 per hour (for modern furnace devices at normal pressure – not higher than 106).

Most important element of the HPG is catalytic fire nozzles (panels, matrixes) on which occurs actually oxidation process. One of the reasons constraining propagation of HPG – insufficient

technical and economic efficiency of ceramic or metal fire nozzles.

Variants of the flameless heatpower generator (HPG) designs

Ceramic fabric Punching ceramics

Scheme of the pendant drop melt extraction (PDME) method

Possibility of high-melt and composition fibers production due to non-

tigel melting

The scheme and view of installation for fibers obtaining and canvases formation by the PDME method.

1 ‑ moving (the accepting) surface; 2 ‑ forming canvas; 3 ‑ workpiece to dispersion; 4 – rotated heat receiver.

The PDME installation is intended for obtaining fibers and porous mats from

them directly during fiber's production.

Settlement productivity is 65 kg of fiber per day.

Rods with a diameter of 12 mm and 800 mm long are used as workpieces.

At the same time it is possible to use some workpieces.

PDME method application at a extraction of fibers (threads) from several rods provides process productivity increase and

formation of a canvas reduces a production cycle time

Structure of canvases made from the metal fibers and used for creation of porous permeable elements

Modification by nano-ceramic synthesis on metal surfaceMicroarc Discharge Oxidizing (MDO)

ООО «РУССКИЕ КОТЛЫ»

Fields of MDO applications

High temperature and pressure in discharge

channels, rapid cooling

T2000-8000 К

P106 Pa, v106 К/с

A – anodic half-period C – cathodic half-period

E l e c t r o l y t e

An- Am- OH- O2-

Men+ Mem+

M e t a l

.

E l e c t r o l y t e

H+ Men+

M e t a l

A C

Valve metals (Al, Mg, Ti, Ta, Nb, Zr, Be, Hf, W, Bi, Sb, U) exhibits the valve effect with forming AOF in metal-oxide-electrolyte system

Surface of metal before MDO

3

2

1

Structure of MDO- proceeding surfacesMultylayered composite material:1 – transitive layer 2 – functional layer 3 – technological layer

Scheme of the MDO equip and proceeding

1 – electrolyte bath; 2 – water cooling; 3 – bubbler; 4 – electrolyte; 5, 6, 9 – valves; 7 – filter; 8 – water pump;

10 – heat exchanger (cooler); 11 – object of proceeding; 12 – air compressor; 13 – exhaust umbrella; 14 – exhaust fan;

15 – technological power supply

Object of proceeding

Preliminary cleaning(washing to degreasing)

Rinse after treatment

Drying

Ready made products

MDO

Flow diagram under MDO

MDO technological line

Formed from metal fibers porous mat (а) and the same material after ceramization by MDO (б).

Examples of MDO usage for another heat power appliances

Many thanks for your attention!

K.E. Tsyolkovsky «MATI» - Russian State Technological UniversityTechnologies of Materials Treatment by High Energy Flows Department www.tompve.ru

tel: +7-495-3538334, fax: +7-495-3538372, e-mail: tompve-2005@yandex.ru